/* Copyright (c) 2022-2022, LiWangQian<liwangqian@huawei.com> All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#pragma once

#include "libflexe/infra/stl/string.h"
#include <filesystem>

namespace libflexe::infra {

class file_path {
public:
    constexpr explicit file_path(stl::string_view path)
        : full_path_(path)
        , file_name_{get_file_name(path)}
    {}

    constexpr auto path() const noexcept -> stl::string_view
    {
        return full_path_;
    }

    /// @brief 
    /// @return 
    constexpr auto file_name() const noexcept -> stl::string_view
    {
        return file_name_;
    }

    constexpr file_path(const file_path &) = default;
    constexpr file_path &operator=(const file_path &) = default;

    constexpr file_path(file_path&&) noexcept = default;
    constexpr file_path &operator=(file_path &&) noexcept = default;

private:
    static constexpr stl::string_view get_file_name(stl::string_view path) noexcept
    {
        auto sep_pos = path.find_last_of(std::filesystem::path::preferred_separator);
        return sep_pos != path.npos ? path.substr(sep_pos + 1) : path;
    }

    stl::string_view full_path_;
    stl::string_view file_name_;
};

} // namespace libflexe::infra
